Electropolishing & Passivation Specialists


Stainless Steel FinishingHere at EMI, we have Stainless Steel Finishing Specialists — they specialize in the finishing of stainless steel through a process called Electropolishing and passivation. Electro-Max also offers complementary services such as stainless steel pickling and degreasing. Our goal is to become your only source for metal finishing by providing superior customer interaction, excellent value, and top-notch quality. With our validated processes, we are one of only a few in the U.S.A. able to offer Nadcap approved electropolishing. Electropolishing is an electrochemical process that effectively removes surface material and imperfections from stainless steel parts by removing the peaks and valleys through a controlled current while effectively streamlining the part and creating a stronger passive oxide layer. This passive layer is what protects your part from corrosionability. Electropolishing is a far superior final finish as opposed to other mechanical processes such as buffing or grinding which can actually hurt or break the surface material on the part creating corrosion zones and growth sites. This process serves many purposes from cosmetic improvements to creating a more passive layer for better corrosion and erosion resistance.

Prior to any passivation process, the parts must be degreased and cleaned so that no surface contaminants remain. Industry-standard is to use an alkaline degreaser if necessary and pickle to remove any other foreign matter that may be present before the passivation process. The pickling process removes any dirt, scale, and treats other weld affected areas. All parts must pass a water break free test to ensure complete passivation every time. All processes are verified through testing after passivation or electropolishing. Electro-Max is one of the largest volume pickle/passivation shops in the Midwest and has the capabilities of developing proprietary passivation processes to meet the most demanding of needs.

At Electro-Max, we realize that every customer and every job is unique. Our management team has more than 40 years experience with stainless steel electropolishing and will work with you to identify your specific needs and to select the appropriate metal finishing option for your product. We provide price quotes within 24 hours, and usual turn-around time is 3 to 5 business days for pickle passivate and 5-7 days for electropolishing. At EMI we work hard to ensure that every job meets our customers’ specific requirements. Contact us to learn more about how we can serve your company’s metal finishing needs.